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CVE-2020-24337: AMNESIA:33 #53

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senier opened this issue Dec 23, 2020 · 0 comments
Open

CVE-2020-24337: AMNESIA:33 #53

senier opened this issue Dec 23, 2020 · 0 comments
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Denial of Service IPv4 Missing Length Check OSS TCP

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senier commented Dec 23, 2020 •
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Description

The function that processes TCP options does not validate their lengths, allowing attackers to put the function into an infinite loop with uncommon/unsupported TCP options that have crafted length values.

Root cause

An issue was discovered in picoTCP and picoTCP-NG through 1.7.0. When an unsupported TCP option with zero length is provided in an incoming TCP packet, it is possible to cause a Denial-of-Service by achieving an infinite loop in the code that parses TCP options, aka tcp_parse_options() in pico_tcp.c.

Software

Name

picoTCP, picoTCP-NG

Versions affected

≤ 1.7.0

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Denial of Service IPv4 Missing Length Check OSS TCP
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@senier